Lenovo ideaTab S2110A – How to disassemble ideatab S2110A – How to test the AC adapter – How to test the battery pack – How to replace the battery – Tablet repair and service

Category: Tablets Repair and service

Contents of this article

How to test the battery pack

How to test the charger

How to replace the battery

Lenovo ideaTab S2110A

To verify a symptom, follow the steps below:
1. Turn off the computer.
2. Remove the battery pack.
3. Connect the AC adapter.
4. Make sure that power is supplied when you turn on the computer.
5. Turn off the computer.
6. Disconnect the AC adapter and install the charged battery pack.
7. Make sure that the battery pack supplies power when you turn on the computer.
If you suspect a power problem, see the appropriate one of the following power
supply checkouts:
“Checking the AC adapter”
“Checking operational charging”
“Checking the battery pack” Checking the AC adapter
You are here because the computer fails only when the AC adapter is used.
If the power-on indicator does not turn on, check the power cord of the AC adapter
for correct continuity and installation.
To check the AC adapter, follow the steps below:
1. Unplug the AC adapter cable from the computer.
2. Measure the output voltage at the plug of the AC adapter cable. See the following
figure:

Note:Output voltage for the AC adapter pin No. 2 may differ from the
one you are servicing.

3. If the voltage is not correct, replace the AC adapter.
4. If the voltage is acceptable, do the following:Replace the system board.Note:Noise from the AC adapter does not always indicate a defect.Checking operational charging
To check whether the battery charges properly during operation, use a discharged
battery pack or a battery pack that has less than 50% of the total power
remaining when installed in the computer.

Perform operational charging. If the battery
status indicator or icon does not light on, remove the battery pack and let it
return to room temperature. Reinstall the battery pack. If the charge indicator
or icon is still off, replace the battery pack.
If the charge indicator still does not light on, replace the system board. Then
reinstall the battery pack. If it is still not charged, go to the next section.Checking the battery pack
Battery charging does not start until the Power Meter shows that less than 95% of
the total power remains; under this condition the battery pack can charge to 100%
of its capacity. This protects the battery pack from being overcharged or from
having a shortened life.
To check your battery, move your cursor to the Power Meter icon in the icon
tray of the Windows taskbar and wait for a moment (but do not click it), and
thepercentage of battery power remaining is displayed. To get detailed
information about the battery,
double-click the Power Meter icon.Note:If the battery pack becomes hot, it may not be able to be charged.
Remove it from the computer and leave it at room temperature for a while. After
it cools down, reinstall and recharge it.
To check the battery pack, follow the steps below:
1. Turn off the computer.
2. Remove the battery pack and measure the voltage between battery terminals
1 (+) and 7 (-). See the following figure:

3. If the voltage is less than +11.0 V DC,
the battery pack has been discharged.

Note:Recharging will be continued for at least 3 hours, even though the
indicator does not light on.
If the voltage is still less than +11.0 V DC after recharging, replace the
battery.
4. If the voltage is more than +11.0 V DC, measure the resistance between battery
terminals 5 and 7. The resistance must be 4 to 30 KΩ. If the resistance is not
correct, replace the battery pack. If the resistance is correct, replace the
system board.

DISASSEBMLING

Battery pack

Pull out the SIM card slot cover with a
fingertip in the direction shown by the arrow 1.

Open the back cover along the device frame
with a flat blade in the direction shown by arrows 2. Lift the back cover in
the direction shown by the arrow 3.

Disconnect the battery connector 1, then remove
the battery by holding the right edge of the battery pack in the direction
shown by the arrow.